<li class="dropdown">
    <a href="#" class="dropdown-toggle" data-toggle="dropdown">
        <i class="fa fa-tasks fa-fw"></i>
        <i class="fa fa-caret-down"></i>
    </a>
    <ul class="dropdown-menu dropdown-tasks">
        <li>
            <a href="#">
                <div>
                    <p>
                        <strong>任务一</strong>
                        <span class="pull-right text-muted">40%</span>
                    </p>
                    <div class="progress progress-striped active">
                        <div class="progress-bar progress-bar-success"
                             role="progressbar"
                             aria-valuenow="40" aria-valuemin="0" aria-valuemax="100"
                             style="width: 40%;">
                                <span class="sr-only">完成40%</span>
                        </div>
                    </div>
                </div>
            </a>
        </li>
        <li class="divider"></li>
        <li>
            <a href="#">
                <div>
                    <p>
                        <strong>任务一</strong>
                        <span class="pull-right text-muted">40%</span>
                    </p>
                    <div class="progress progress-striped active">
                        <div class="progress-bar progress-bar-success"
                             role="progressbar"
                             aria-valuenow="40" aria-valuemin="0" aria-valuemax="100"
                             style="width: 40%;">
                            <span class="sr-only">完成40%</span>
                        </div>
                    </div>
                </div>
            </a>
        </li>
    </ul>
</li>